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Casio FX-991EX Battery Replacement

Introduzione

The Casio FX-991EX can malfunction if the battery is discharged, even with solar power. Thankfully, replacing it is a simple job.

Cosa ti serve

  1. Casio FX-991EX Battery Replacement, Remove the battery cover: passo 1, immagine 1 di 2 Casio FX-991EX Battery Replacement, Remove the battery cover: passo 1, immagine 2 di 2

    • Remove the battery cover's screw using a Philips #0 screwdriver.

    Modifica

  2. Casio FX-991EX Battery Replacement, Remove the battery: passo 2, immagine 1 di 2 Casio FX-991EX Battery Replacement, Remove the battery: passo 2, immagine 2 di 2

    • Use a spudger to remove the battery using the gap to the right.

    • Don't use sharp objects that may cause harm or damage. The battery can be hard to pop out.

    Modifica

  4. Casio FX-991EX Battery Replacement, Replace the battery: passo 3, immagine 1 di 2 Casio FX-991EX Battery Replacement, Replace the battery: passo 3, immagine 2 di 2

    • The FX-991EX uses a 1.5V LR44 battery.

    • Slot the new battery into the compartment. Ensure that the positive side (with writing) faces up...

    • And the negative side faces the calculator's screen.

    Modifica

  5. Casio FX-991EX Battery Replacement, Screw the cover back on: passo 4, immagine 1 di 1

    • Slot the battery cover back on and screw it down.

    Modifica
Conclusione

If you need to reset the calculator after this, it's SHIFT+9 > 3 > =.

Otherwise, you're ready to crunch numbers again!

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